503260 - Traditional chinese characters aren't displayed completely

Status: RESOLVED WONTFIX

(Core :: General, defect, P2)

Description

[skempe]

User-Agent:       Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)
Build Identifier: firefox build for WinCE

Some of the traditional chinese characters are missing from the latest firefox build. Internet explorer shows all the chracters. 

firefox build 29th May & later builds --> issue observed (uses GL acceleration)
firefox build 28th May --> issue not observed

Reproducible: Always

Steps to Reproduce:
1.install and run firefox
2.open tw.yahoo.com on wince and on desktop firefox
3.compare both side by side (look above the search text field)
(image twyahoo.JPG showing the issue is attached) 
Actual Results:  
Check the characters above the serach text filed.  on firefox wince you'll notice only on character while on desktop firefox you'll notice two characters. 
The same thing will be noticed on the left hand side under "My".
Internet Explorer on the same WinCE setup shows both the characters. 

Expected Results:  
All characters should be displayed

This is a regression

Comment 1

[skempe]

Attachment: shows the differences between firefox and IE

Comment 2

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Interesting, this actually worked at some point?

We're going to have some font issues with CJK due to font compression that's in use on Windows CE, but that should've affected builds both before and after the GL accel work.  I'll take a look.

Comment 3

[Justin Dolske [:Dolske]]

I think this isn't just CJK, the "pronunciation" bit at the top of many Wikipedia articles also has blocked-out characters like the screenshot here. EG, http://en.wikipedia.org/wiki/Franz_Schubert

Maybe the CE fonts are just missing a lot of unicode characters?

Comment 4

[skempe]

>>Interesting, this actually worked at some point?
If I install Non GL accelerated firefox on the same device then I'm able to see all the characters. 

>>Maybe the CE fonts are just missing a lot of unicode characters?
Also the attachement by me has Internet explorer on top on firefox (GL accelerated) on the same device. IE shows all the characters while firefox is missing them.

Comment 5

[Takuro Ashie [:ashie]]

I'm not sure about this bug and GL build, behavior shown in the attachment 387601 [details] is similar with bug 490285.

Comment 6

[Tony Chung [:tchung]]

qq.com is completely unreadable, which is an alexa topsite.

Comment 7

[Takuro Ashie [:ashie]]

Probably it's same issue with bug 489752, and mainly depends on bug 490267.
If not, please remove dependency I've added.

Comment 8

[Tony Chung [:tchung]]

flagging onto triage radar for blocking1.9.2

Comment 9

[Mike Beltzner [:beltzner, not reading bugmail]]

If bug 490267 is FIXED, is this now FIXED as well?

Comment 10

[Justin Dolske [:Dolske]]

Nope, not fixed. Characters on tw.yahoo.com and qq.com are still just all solid rectangles, as is the Wikipedia bit in comment 3. 

Although I think it's improved, on some pages I'm seeing less of the rectangles. [In particular, the down-arrow next to "more" at the top of google.com/firefox used to just display as a block.]

Comment 12

[Mike Beltzner [:beltzner, not reading bugmail]]

Vlad, what's the story, here? Do we need to fix this for release, or can we get it for a security and stability release afterwards?

Comment 13

[Mike Beltzner [:beltzner, not reading bugmail]]

Vlad/Dolske: answer for comment 12?

Comment 14

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

I believe after should be fine; haven't had a chance to look into this.

Comment 15

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Going to remove blocking, but will take a patch for a minor release.

Comment 16

[Ed Morley [:emorley]]

WinCE/Windows Mobile support has been removed from the main build system, Spidermonkey, mobile installer, in-app updater and so on (see bug 614720, bug 554087 and all their dependants). Until such point where MS decide to release a Windows Phone 7 NDK and the decision is made to port to that platform, this is WONTFIX.

Filter bugmail on WinCEMassWONTFIX.